Astrophysics and Space Science

, Volume 210, Issue 1–2, pp 369–370 | Cite as

Long-term V/R variations of Be stars due to global one-armed oscillations of equatorial disks

  • Atsuo T. Okazaki
III. Models

Abstract

We study the long-term variations of Balmer line profiles due to global one-armed oscillations in Be-star disks. In order to examine the qualitative effects of oscillations on line profiles, we assume that the eigenfunctions of one-armed nonlinear oscillations are similar to those of linear oscillations. Computing the line profiles for various values of disk parameters, we find that in small disks or in disks with steep density gradients the one-armed fundamental modes cause remarkable variabilities similar to the observedV/R variations.

Keywords

Density Gradient Fundamental Mode Line Profile Nonlinear Oscillation Small Disk 

References

  1. Kato, S.: 1983,Publications of the ASJ,35, 249.Google Scholar
  2. McLaughlin, D. B.: 1961,J. Roy. Astron. Soc. Canada,55, 73.Google Scholar
  3. Okazaki, A. T.: 1991,Publications of the ASJ,43, 75.Google Scholar

Copyright information

© Kluwer Academic Publishers 1993

Authors and Affiliations

  • Atsuo T. Okazaki
    • 1
  1. 1.College of General EducationHokkai-Gakuen UniversitySapporoJapan

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